$ python setup.py install
# or copy pyderasn.py (possibly termcolor.py) to your PYTHONPATH
-``termcolor`` is an optional dependency used for output colourizing.
-``urwid`` is an optional dependency used for :ref:`interactive browser <browser>`.
+* ``termcolor`` is an optional dependency used for output colourizing.
+* ``urwid`` is an optional dependency used for :ref:`interactive browser <browser>`.
+* ``dateutil`` is an optional dependency used for ``.totzdatetime()`` method.
You could use pip (**no** OpenPGP authentication is performed!) with PyPI::